You can find the Xiaomi Flash Tool Shortcut on your Windows Menu. And you can also start the Xiaomi Flash Tool directly from the installed folder (i.e C:> Program Files > Xiaomi > MiPhone > MiFlash.exe).

Readme Once:

[*] There is no need to install the drivers separately, as all the drivers came with the Xiaomi Flash Tool and get installed duing the Xiaomi Flash Tool installation process.